A “Hello, World!” program is a computer program that outputs “Hello, World!” on a display device. It is typically one of the simplest programs possible in almost all computer languages. As such it can be used to quickly compare syntax differences between various programming languages.

Assembler

global    _main
          extern    _puts

          section   .text
_main:    push      rbx                     ; Call stack must be aligned
          lea       rdi, [rel message]      ; First argument is address of message
          call      _puts                   ; puts(message)
          pop       rbx                     ; Fix up stack before returning
          ret

          section   .data
message:  db        "Hello World!", 0        ; C strings need a zero byte at the end

C++ language:

#include <iostream> // IO stream library

// Body of the program
int main() {
  // Send "Hello World!" to output with end line
  std::cout << "Hello World!" << std::endl;

  return 0;
}

COBOL:

HELLO
        IDENTIFICATION DIVISION.
        PROGRAM-ID. HELLO.
        PROCEDURE DIVISION.
                DISPLAY "Hello World!".
                STOP RUN.

Erlang:

%%%-------------------------------------------------------------------
%%% @author fearless
%%% @copyright (C) 2020, FEARLESS SPIDER
%%% @doc
%%%
%%% @end
%%% Created : 06. gru 2020 7:13 PM
%%%-------------------------------------------------------------------
-module(hello_world).
-author("fearless").

%% API
-export([hello_world/0]).

hello_world() -> io:fwrite("Hello World!\n").

Go

package main

import "fmt"

func main() {
    fmt.Println("Hello World!")
}

Java

class HelloWorld {
    public static void main(String args[]) {
        System.out.println("Hello World!");
    }
}

Perl

#!/usr/bin/perl

# Modules used
use strict;
use warnings;

# Print function
print("Hello World!\n")

Python

if __name__ == '__main__':
    print("Hello World!")

Ruby

puts "Hello World!"

Swift

print("Hello World!")

All “Hello, World!” programs are here https://github.com/fearless-spider/spider-zine/tree/master/hello_world